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Why is that stupid? The 3is has alot more exhaust options and cheaper then some exhausts for the 2IS. I myself am wondering if 3is exhaust can fit 2IS. For example the Ark exhaust has a much better design with an x pipe, where as the 2IS has a Y pipe going into a fat resonator.
why would it fit... stock exhaust is different setup between 2IS and 3IS... 2IS is not a true dual exhaust stock and 3IS is... 3IS is also a longer car than the 2IS... do i need to explain anymore?